82583V Datasheet, PDF (224/374 Pages) Intel Corporation – Intel® 82583V GbE Controller

82583V GbE Controller—Driver Programing Interface
9.2.4
9.2.4.1
Link Layer Events
Event
Mapping
Flow control DLLP received in link layer. 56
Ack DLLP received.
57
Nack DLLP received.
58
Description
Each cycle, the counter increases by 1, if message
was received.
Each cycle, the counter increases by 1, if message
was received.
Each cycle, the counter increases by 1, if message
was transmitted.
Interrupt Register Descriptions
Interrupt Cause Read Register - ICR (0x000C0; RC/WC)
Field
TXDW
TXQE
LSC
Reserved
RXDMT0
Reserved
RXO
RXT0
Reserved
MDAC
Reserved
TXD_LOW
SRPD
ACK
Bit(s)
0
1
2
3
4
5
6
7
8
9
14:10
15
16
17
Initial
Value
0b
0b
0b
0b
0b
0b
0b
0b
0b
0b
0x0
0b
0b
0b
Description
Transmit Descriptor Written Back
Set when hardware processes a descriptor with RS set. If using
delayed interrupts (IDE set), the interrupt is delayed until after one of
the delayed-timers (TIDV or TADV) expires.
Transmit Queue Empty
Set when the last descriptor block for a transmit queue has been
used.
Link Status Change
This bit is set whenever the link status changes (either from up to
down, or from down to up). This bit is affected by the link indication
from the PHY.
Reserved
Receive Descriptor Minimum Threshold Hit.
This bit indicates that the number of receive descriptors has reached
the minimum threshold as set in RCTL.RDMTS. This indicates to the
software to load more receive descriptors.
Reserved
Receiver Overrun
Set on receive data FIFO overrun. Could be caused either because
there are no available buffers or because PCIe receive bandwidth is
inadequate.
Receiver Timer Interrupt
Set when the timer expires.
Reserved
MDIO Access Complete
Set when MDIO access completes. See Section 9.2.7.36 for details.
Reserved
Transmit Descriptor Low Threshold Hit
Indicates that the number of descriptors in the transmit descriptor
ring has reached the level specified in the Transmit Descriptor Control
register (TXDCTL.LWTHRESH).
Small Receive Packet Detected
Indicates that a packet of size < RSRPD.SIZE has been detected and
transferred to host memory. The interrupt is only asserted if
RSRPD.SIZE register has a non-zero value.
Receive ACK Frame Detected
Indicates that an ACK frame has been received and the timer in
RAID.ACK_DELAY has expired.
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